# 3DCONVERSIONMODE System Variable [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [System Variables](Help%20System/GSTARCAD/2027/System%20Variables/(System%20Variables).md) **Function Description:** The 3DCONVERSIONMODE system variable is used to convert materials and light definition into current product version. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 1 | | Range | 0,1,2 | **System Variable Value:** **0:** it will not convert the materials and light when opening a drawing **1:** it will automatically convert the materials and light **2:** it prompts users to convert any materials and light --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/systemVariables/3DCONVERSIONMODE.html) · © Gstarsoft Co., Ltd.